K81DJ review:
First impressions
Heavy, tough build quality, very very nice. The 3D-Axis folding system works like a charm, although not as nicely as the system Ultrasone uses on their DJ1-Pros. Generally, a pair of durable cans all-around that can take abuse, although it's main weak point is the plastic swivel.
Past that, there's a concern of the headband. AKG should rename these as K-Headclamp-DJs. Literally clamps your head like there's no tomorrow. Before wearing them, take the time to stretch it out between some books or speakers and use a hairdryer to soften up the plastic/metal while on the books/speakers. This will effectively 'lock-in' the desired/fixed shape. Aside from the headband issue, the cans are fairly comfortable. Pads are made from supple pleather with some medium density foam behind it.
Other than the headclamp, there aren't really glaring comfort problems, except some form of padding could be installed on the headband as it is a bit uncomfortable to have the headband sink into your head.
Sound
Right off the bat, it's quite obvious that these are very bassy cans. It's not 'bad' bass per se, just that it's very overwhelming and can dorwn out the other frequencies. This can be remedied somewhat by removing the thick foam circle protecting the driver cover from damage. It tames the bass down quite a bit and allows the mids and highs to shine through. Soundstage is also fairly wide, although not as wide as it can be. Highs suffer a bit, but I suspect it'll improve as I continue to burn them in (currently at 45 hours or so). Imaging is also pretty decent, living up to AKG standards, so it's a decent can to play CS with (the bass gives CS quite a noticeable oomph). It's also a closed can, thus no sound leaks out---perfect for late night gaming session.
Cost and misc. info
These can be picked up quite cheaply on the secondary market (around $40) like Head-Fi, and are a fantastic bargain. Just so people don't get confused, these are NOT the K181DJs---those are different and cost more. However, this IS the same as the K518Dj...just has silver accents, whereas on the K518 the accents are blacked out.
Review written by Brendan
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